In this light, direct detection strategies are proposed for DM particles with KeV to MeV mass. In
this range, DM scattering with electrons can cause single-electron
ionization signals, which are detectable with current technology. Ultraviolet photons, individual ions, and heat are interesting alternative signals. For example, the light DM regime (\(1~\rm MeV\)  to \(10~\rm GeV\) ) where DM interacts with atomic electrons via recoiling is now significantly constrained by recent data from the XENON1T[1]}, DarkSide50[2]} and SENSEI[3]} experiments.
